Best 30 Kva Transformer 480 to 208: Top 5 Industrial-Grade Solutions
Choosing the right transformer for converting 480V to 208V in industrial or commercial setups involves evaluating voltage compatibility, reliability, and mounting options. This guide highlights five 30 kVA-capable or nearby options that provide robust performance for HVAC, control panels, and equipment that require consistent 24V or 120V/208V secondary outputs. Each entry features mounting style, protection features, and build quality to help engineers compare quickly.
| Product | Primary Voltage | Secondary Voltage | VA Rating | |
|---|---|---|---|---|
| Functional Devices TR50VA008 | 480/277/240/208 | 120 Vac | 50 VA | Foot and dual threaded hub; US-made |
| Industrial Control Transformer (Hubbell Acme Electric) | 240/480 Primary | 120/240 Secondary | 50–5000 VA range | Epoxy encapsulated; high-efficiency core |
| Functional Devices TR150VA008 | 480/277/240/208 | 120 Vac | 150 VA | Foot and dual threaded hub; circuit breaker |
| MARS 50321 Transformer | 120/208/240/480 | 24V | 75 VA | Wire leads; compact control transformer |
| 100VA Transformer (LLPParts) | 120/208/240/480 | 24V | 100 VA | Multi-voltage; warranty; local delivery |
The products listed here cover common needs in controlling HVAC equipment, furnaces, and automation circuits. They provide variations in VA rating, mounting, and secondary voltages to fit different control schemes, from low-voltage 24V controls to 120V circuits. The following sections detail five strong choices with objective specifications and design notes.
Functional Devices TR50VA008 Transformer
The TR50VA008 is a compact transformer designed for 480/277/240/208 V primary options with a 120 V secondary. With a modest 50 VA rating, it is suitable for control circuits, signaling, and small loads in panels. The unit supports foot mounting and dual threaded hubs for flexible installation. Construction emphasizes reliable performance in harsh environments, and it is manufactured in the United States. Its lightweight package weight and slim dimensions support quick integration into compact control enclosures.
Industrial Control Transformer (Hubbell Acme Electric)
Hubbell Acme Electric’s transformer covers a broad range, from 50 VA up to 5,000 VA, with a 240/480 V primary and 120/240 V secondary configuration. The epoxy-encapsulated design protects the core and coil from contaminants, while the silicon steel lamination minimizes core losses for improved efficiency. This makes it suitable for industrial control panels and equipment that require dependable, scalable power conversion. The unit emphasizes durability and energy efficiency for long-term operation in challenging environments.
Functional Devices TR150VA008 Transformer
The TR150VA008 expands to 150 VA while maintaining the same 480/277/240/208 to 120 V secondary configuration. It is designed for foot and dual threaded hub mounting and includes a circuit breaker option for added protection. This transformer is appropriate for larger control circuits or devices that require more current than the 50 VA variant. It provides robust performance in industrial panels with secure mounting and reliable regulation of 120 V outputs.
MARS 50321 Transformer
The MARS 50321 provides 75 VA with a primary set of 120/208/240/480 V and a 24 V secondary. It uses wire leads for connection, which can simplify integration into existing harnesses or panel layouts. The 24 V output is common for signaling, relay coils, and other automation components. This transformer balances compact size with sufficient power for moderate-control loads and is a common choice for HVAC and industrial controls that require reliable low-voltage power.
100VA Transformer by LLPParts
The LLPParts 100 VA transformer supports 120/208/240/480 V primary with a 24 V secondary and includes a warranty of one year. It is designed for quick delivery and local service across numerous states. The multi-voltage capability makes it versatile for HVAC and control applications that demand a stable 24 V supply. The unit is positioned for straightforward replacements or panel upgrades, offering dependable performance in demanding environments.
Buying Guide
Key purchase considerations for 480 to 208 V transformers include voltage compatibility, VA rating, and secondary voltage needs. For control circuits and relays, 24 V or 120 V secondary outputs are common, while some HVAC or automation panels may require higher-current 120 V or 240 V surges. Consider mounting options (foot vs. hub), enclosure space, and whether a transformer includes protective features such as circuit breakers or epoxy encapsulation to resist dust and moisture. Efficiency and core materials (silicon steel lamination) influence heat generation and energy loss, which matters in continuous operation.
From a reliability perspective, choose transformers with robust mounting and enclosure ratings suitable for the installation environment. For panel builders, epoxy-encapsulated designs can reduce contamination risk in dusty or humid locations. If service life or expanded capacity is anticipated, select units with higher VA ratings within the 30 VA to 150 VA range to avoid frequent replacements. Finally, verify lead configuration or mounting hardware compatibility with existing racks to simplify installation and serviceability.